Question 90755: Which of the ordered pairs
(3, 1), (7, 0), (–1, –2), (–25, 8)
are solutions for the equation x + 4y = 7?
Answer by praseenakos@yahoo.com(507)   (Show Source):
You can put this solution on YOUR website! Question:
Which of the ordered pairs
(3, 1), (7, 0), (–1, –2), (–25, 8)
are solutions for the equation x + 4y = 7?
Answer:
Given equation is x + 4y = 7
To check whether the given ordered pair is a solution of the given equation, substitue x value and y value in the given equation. If you get same vlue on both sides of the equal sign, then the ordered pair is a solution, otherwise not.
Take (3,1)
==> 3 + 4 * 1 = 7
==> 3 + 4 = 7
==> 7 = 7
That is (3,1) is a solution.
Take (7,0 )
==> 7 + 4* 0 = 7
==> 7 + 0 = 7
==> 7 = 7
That is (7,0) is a solution.
Take ( -1, -2 )
==> -1 + 4*-2 = 7
==> -1 - 8 = 7
==> -9 = 7, which is not true
That is (-1,-2) is not a solution.
Take (-25,8)
==> -25 + 4* 8 = 7
==> -25 + 32 = 7
==> 7 = 7, which is true.
That is (-25,8) is a solution
That is (3, 1), (7, 0), (–25, 8) are the solutions of the given equation.
Hope you found the explanation useful.
Regards.
Praseena.
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